{"uid":"cap_xFXRWfCY_TjChzWIra260","slug":"base-usdc-eth-balance-checker-2cd2f779","name":"Base USDC & ETH Balance Checker","description":"Live Base mainnet USDC and ETH balance for one address, read with eth_call at the latest block; returns decimal and raw values plus the block number. Use it to check a wallet can cover a payment or that funds arrived before acting. Simpler than running an RPC client and decoding ERC-20 calls yourself, and the block number makes each reading reproducible. Query: ?address=0x...","url":"https://89-116-220-218.sslip.io/base/usdc-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Base address to read (0x + 40 hex chars)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_u5V3J6Ko2GhDsfqg7zTc8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the live USDC and ETH balances for a given Base mainnet wallet address, including decimal and raw values plus the current block number.","exampleAgentPrompt":"Before sending the invoice payment, check whether wallet 0x4a2b8c9d1e3f5a7b9c0d2e4f6a8b0c2d4e6f8a0b on Base has at least 50 USDC available right now.","exampleUseCases":[{"title":"Pre-payment funds verification","prompt":"Before I trigger the payout to 0x1234567890abcdef1234567890abcdef12345678, can you confirm they have at least 100 USDC on Base mainnet right now?"},{"title":"Confirm incoming crypto payment","prompt":"My client said they just sent 250 USDC to 0xabcdef1234567890abcdef1234567890abcdef12 on Base — can you check if the funds have arrived yet?"},{"title":"DeFi agent wallet balance check","prompt":"What are the current ETH and USDC balances for the agent wallet 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef on Base, and which block was that read at?"}],"resultDescription":"Returns the USDC and ETH balances for the queried Base address in both human-readable decimal form and raw integer form (wei / smallest unit), along with the block number at which the balances were read, making the snapshot reproducible and auditable.","failureModes":["Invalid address format (not 0x + 40 hex chars) — returns 400 or validation error","Address not found or zero-balance address — returns zero values rather than an error","RPC node lag or Base network congestion — may return slightly stale block","Service unavailable or payment not processed — returns 402 or 5xx error","Network timeout if Base RPC is slow at query time"],"whenToPreferThis":"Choose this endpoint when you need a quick, no-infrastructure USDC and ETH balance check on Base mainnet without setting up your own RPC client or manually decoding ERC-20 calls. Ideal for pre-payment checks, confirming fund arrivals, or gating agent actions on wallet solvency. The included block number makes each reading auditable and reproducible. Prefer the sibling 'all-in-one' endpoint if you also need Basename resolution or transaction count in the same call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:13:41.261Z","isFirstParty":false,"canonicalSlug":"base-usdc-eth-balance-checker-2cd2f779"}